Centrifugal pump.



. C. RADiGUER.

CENTRIFUGAL PUMP.

APPLICATION FILED OCT. 29. 1913.

1,220,000. Patented Mar. 20, 1917.

2 SHEETS-SHEET 1.

0. BADIGUER. CENTRIFUGAL f UMP.

APPLICATlON HLED OCT- 29, 1913- Patelited Mar. 20, 1917.

u I SHEETS-SHEET 2.

UNITED sTA'rus PATENT onnrcu.

CHARLES RADIGUER, OF ST.-DENIS, FRANCE; ASSI'GNOR TO THE SOCIETE ANONFME DES ETAIBLISSEMENTS 'DELAUNAYvBELLEVILIlEQ. F ST.-DENIS, FRANCE,

TION 0F FRANCE.

A CORPORA- cnn'rnrructhii rum.

Specification of Letters Patent.

Patented Mar. 20, 191a.

Application filed October 29, 1913. Serial No. 7138,0 17.

To all whom it may concern:

Be it known that 1, CHARLES RADIGUER, citizen of the French Republic, residing at St.-Denis, Department of the Seine, in

5 France, have invented certain new and useful Improvements in or Relating to Gentrifugal Pumps and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

The use of ejectors has shown that'it is easy to carry forward a fluid by means of a liquid and to drive it into a medium having a higher pressure. A similar result has been obtained by projecting by means of a wheel followed by a distributer, jets of water spaced from one another and carrying away between them the fluid to be compressed.

It has also been attempted to form the water leaving the wheel into a disk of even thickness by causing it to pass a distributor comprising plates; the rojected water has been utilized by CHJJSIIIO it to pass through a distributer perforated with small orifices so as to form a very fine spray vfacilitating the mixture ofv the low pressure fluid with themotive water.

The objectof the present'invention consists:

1. In the use of a wheel provided with' suitable buckets projecting water, without the aid of any distributer, in sheets of ellipsoidal form. It has the advantage of presenting an extremely extended surface of friction insuring a great entraining action on the fluid to be compressed. Moreover, the elimination of the distributer leaves the water all the kinetic energy which has been i 40 imparted thereto by the wheel; which fact permits ofattaining a high manometric coeflicient.

2. In the disposition of two distinct outlet conduits for the motive fluid and the compressed fluid, provided at their admission, with partitioned separators so that the .motive fluid flows away in a continuous and uniform mannerthrough the lower conduit and the compressed fluid through theupper 5 0 conduit.

3. In the use of a constant level on the finally the division of water outlet conduit by using, in particular, a discharge tank having its pressure equilibrated with that of the compressed fluid by means of a communication between them.

4. In the provision of a water return pipe from the discharge tank to the suction of the I pump in order to supply the latter with water under pressure. a

It is particularly desirable to employ a constant level on the water outlet conduit because, as will be easily understood, the level is subjected to'the pressure of the com,- pressed fluid and the liquid may thus be utilized furnishing an energy corresponding to the pressure which acts upon its level and the quantity supplied to the pump is re placed by Water dischargedby the pump and serving to maintain the constant level. Thus there is no loss of the motive fluid.

This pump may,w of course, be also emas for compressing above the atmospheric pressure and, in the latter case, an isothermic compression is obtained\ a It is also possible to use the water under pressure of the tank for supplying an ejector-condenser located on the exhaust of any kind of machine. r

The accompanying. drawing illustrates only one embodiment of the invention and is only given by way of example.

Figure 1 is an elevation of the apparatus,

'ployed for sucking from a condenser as well parts beingshown in section, especially the buckets of the wheel, the lower constant level and the water discharge tank.

Fig. 2 is an end elevation partly in section showing the location of the separators.

Fig. 3 shows the path discharged from the buckets of the wheel.

Fig. .4 illustrates a detail of the separator. Fig. 5 is an enlarged sectionalview of a portionof the device. 7

Fig. 6 is an enlarged sectional view of the wheel.

The embodiment of the invention illustrated in the drawings includes a cylindrical casing 1, in which a pair ofspaced cheeks or plates F is mounted, which plates form an annular chamber D. Extending into the casing 1 is a shaft 3 which is mounted in a suitable bearing 4 and is provided with flanges 5 to prevent longitudinal movement. The inner end of the shaft carries a wheel B on which tangentially-arranged blades or buckets C are formed. These buckets have concave extremities, as indicated at lViin Fig. 5 of the drawings, and these extremities are located between the plates F. The concave extremities of the buckets cause the projection of the water in the form of sheets having extended surfaces, which, when traversing the chamber D, produce a depression in a manner which will later be apparent. Secured to the conduit port A of the casing 1, and extending therefrom in alinement with the shaft 3,*is a conduit S which communicates with the buckets. C. through openings 8, the water being directed thereto by means of a deflector 9. This, conduit extends to the lower end of and communicates with a water tank M. Extending from this water tank M to the lower end of the casing 1 and communicating with the chamber D, and ,with the annular chamber G which encircles the casing 1, is a conduit H, which is provided with a double valve Q operated by a float R within the chamber tank M. Communication is estab ished between the phamber D and the .cli'ambers 1.1, which are formed within the casing 1, by the plates F by means of ducts E. Extending from the upper portion of the casing l is a conduit 1, which communicates with aconduit'P, through which the compressed fluid is dis-, charged. Extending from this conduit P to the tank M is a relatively smaller pipeZ, so that the pressure on water within the' conduit H and the tank M is equal at all times, and, consequently, the water levels N within the said conduit and tank are the same, The oscillations of the water are somewhat diminished by the valve Q. Disposed in the annular chamber G are devices L for separating the water and compressed fluid, which devices have blades J arranged inthe manner illustrated in the] drawings, and have suitable perforations extending therethrough, through whichlatter communication is establishedbetween the concluit'H and the chamber G, and between the conduit I and the chamber G.

In operation, the water enters the wheel B throu h the port A and the openings 8, flowing directly to the buckets C. The rotation of this wheel B, which is accomplished by means of the shaft 3, causes the pro-v jection of the water in the form of sheets having extended surfaces, which, when traversing the chamber D, produce a depression therein, as before referred to, and draw in the fluid to be carried away, through the ducts E. The mixture of air and water which is thus formed passes through the chamber D between the plates F, which form, in fact, a diffuser, and the speed of the mixture is retarded and the kinetic energy transformed into potential energy. It is well known that the increase in pressure is proportional to the density of the. mixture and to the square of the speed, and it is thus possible to obtain any pressure by either varying the proportion of the mixture,gor

the speed of the wheel. After the mixture is projected from the chamber D, of the diffuser, it circulates in the chamber G and the water flows away through the conduit H, while the compressed'fiuid flows through the conduit I, after having been suitably separated fronithe water. This separation is accomplished by means of the elements L. The mixture, moving in the direction of the arro'ws O, as disclosed in Fig. 4, strikes the blades J, which causes the compressed fluid to pass into the conduit I through the perforations K' and the Water to collect at the lower part of the conduit H, so that it will be carried directly to the Water tank M. The

water levels in the tank M and the conduit H are thus maintained equal, and the conduit S being connectedto the bottom of thetank' M, supplies the wheel B with Water under pressure, so that the energy produced by the wheel benefits by this conservation.

In Fig. 3, T U represents the radial speed of the water issuing from the wheel, and T V represents the peripheral speed thereof.

T V, therefore, represents the resultant speed and direction of the water as it is discharged by the blade. The body of water discharged from a blade will be concave in cross section, due to the shape of the extremity of the blade and will assume the the re-' speed and direction indicated "1) sultant T V. The dashglines 1n Fig. 3 represent the direction taken by the successive particles ofwater leaving the blade C. Assuming a. iven quantit of Water to be in readiness to e discharge by the blade C, the particles which Wlll be first discharged. from the blade are those particles which reach the pointT when'the blade is in substantially the position shown in Fig."

3. The particles which are last projected from the blade are those particles discharged at U, as they must travel the distance T U before they can be discharged from the blade. Durin this time, however,"

thewend of the blade-W111 have moved from the position shown'in Fig. 3 to the point indicated at. .Y. Those particles of water projected from the extreme end portions of the blade will, therefore, not leave the blade until'the same has reached the point Y. The last line shown in Fig. 3 passing through the oint Y indicates the direction of these particles of water, while the intermediate dash lines indicate the direction taken by those particles of water which are projected during the passage'otthe blade from the osition shown in Fig. 3 to the point Y. be particles are, therefore, projected according to the trajectory X which indicates obvious that the body of water projected from eachblade will be concave in cross section, as above stated. I claim:

1. A centrifugal pump comprising a rotary wheel having a plurality of blades with concaved extremities, and means to supply liquid to said wheel which issues from the blades in sheets having a. curved cross'section due to the'concaved extremities of the blades. p

2. A centrifugal pump for compressing fluids, comprising a rotary wheel, a .plurality of blades carried thereby, means to deliver liquid to the wheel which issues from the blades thereof in bodily movable sheets,

a diffuser comprising a pair of spaced converging cheeks forming a restricted portion toward the periphery of the diffuser, the

said cheeks having perforations therein re mote from the restricted portion only, between wh cheeks said sheets of liquid pass'to entrain and compress fluid drawn through-the perforations, an outlet for the compressed fluid, and a separate and independent outlet for the liquid.

, "3-. ;;A centrifugal pump for compressing {f -flui'ds 'z'pmprising a rotary Wheel, a plurality iof' rhlades carried thereby, means to deliver liquid 'to the wheel which issues from the blades lt'h'ereof in bodily moving sheets which-entrain the fiuid, an outlet at the upper portion-ofthe pump for the compressed fluid, and a separate and independentoutlet at the lower part of the pump for the liquid,

whereby the liquid separates from the fluid by gravity, for the purpose described.

. 45 4. The combination with a centrifugal pump, of .a liquid-containing tank, means to maintain the level of the liquid in the tank constant, means to deliver liquid from the tank to the pump, means to return only the liquid from the pump to the tank, a discharge conduit for the fluid compressed by the pump, and means to equalize the pressure in said discharge conduit and in the tank.

In testimony whereof I afiix my signature, in presence of two Witnesses.

CHARLES RADIGUER. Witnesses:

HANSON 0. Com, EMILE KLoz. 

